MOT help SCOOTRS IGNITION no front light

[druist]

Bryon, no garage so rain is stopping play. I didnt wire the rear light only put a better earth on but i would say red = + and black = - this is why i had to long front brake lead on the black as i thought the other headset one would be the + I must have it wrong

looking at Stickys 150 no battery, looks similar, has a microswitch for the rear brake. Going to try tracing where the old front brake wire is, surely it must be somewhere?? Or any other ideas other than process of elimination, if the latter given time for MOT most colours go where they are supposed to so which ones should i concentrate on?

[firekdp]

Just noticed from one of your other posts that you are running a battery, are you using this to power the brake light?

[druist]

No. this battery is just something i added and is an independent circuit for indicators, fuel gauge and egt gauge power, it does connect to a separate 2 pole reg but this doesnt interfere with original setup. The problem i think is down to something changing in the new ignition setup = could the brake light be one of the black leads and i should have put it elsewhere, i am wondering looking at old diagrams of SIL 150's if it could even be a gray or pink wire, but i only have the red , black and earth at the rear light end and a sensor thing underneath the rear brake. There is a redundent green wire that comes from the front but isnt in anything but i think that may have been related to pre electronic ignition days. What i find odd is where is the pink or whatever originally controlled the front brake? I put the hydraulic on myself last yr, i thought it all worked ok in terms of lighting but maybe the front brake didnt it was after last years' mot

[firekdp]

The brake light circuit is independent of the ignition switch so changing it shouldn't affect it.
If the loom originally had front brake switch wiring, you will not find them at the rear but at the brake light switch itself under the foot pedal. Red and black plus earth at the rear is correct, but these are not + or - but 2 individual power supplies, red = brake light, black = tail light.

[byron]

there probably wasn't a front brake light switch or wires for it, as standard there isn't one at all. Some of the new looms comes with the wires fitted [a female spade on a pink and on a grey wire], but maybe yours hasn't, as it's an older conversion ?
So the rear brake light on its own works ok, so use that wiring for the front.
The rear brake light switch gets power on one side from the loom on the way up to the front. The other side of the rear brake light switch then sends this power to the bulb in the rear lamp, which is earthed.
So can you identify which side is which on the rear brake light switch, then connect one side of the front switch to the one that goes to the rear lamp. The other side of the front switch you already have power [from the brown in the headset]. Then you should be ok...?
You have checked the switch itself on the brake m/cyl is actually working and not shorting to earth ?

[druist]

well, the REAR was working fine before i fitted the new ignition on Saturday. I didnt do anything to the rear wires, the switch is making contact ok with the rear brake. So it must be one of the wires i have wrong at the front. Could it be one of the black wires? eg black wires coming off the yellow one with yellow or white on them. Also, was i supposed to separate the strange looking earth, which was part green and then connected by a bullet connector to the black with an earth ring?



If it is common that scoots front brakes dont work will it affect the mot?

Dont think this is related but... Any idea why there would be an old looking green on its own with a plastic shroud coming all the way form the front but severed just before the juntion?

[firekdp]

Any chance of posting some pics of your wiring?

[druist]

http://picasaweb.google.com/druist/Wiring# this was before i did what Bryon suggested. I will take another tonight. here are Bryons comments:

' got the pics drew
you have nothing connected to the orange wire that goes to the handlebar switch, so no power is going to it to then be switched to the main/dip bulb.
where does the black/yellow go that exits top left ?
try connecting that to the orange one
is the black with the red crimp going to the rear lamp ?
what else is in that 3-way connector ?
and you need the black/white one plugged in next to the green.
and I'd probably make some of those connections more sound'

Note I have made the connections more sound than before, now ordered some new bullets connectors. I must have put one in the wrong place. All that happens is the when the rear light is pressed it goes off. I havent changed anything at the rear or at the junction and the sensor seems to be ok.

[firekdp]

Drew, after making the changes advised by Byron does it now look like this? Although I've missed out the brown to the horn

[druist]

You are a STAR, that's brilliant! Thanks, will get back to you with the outcome, but that is going to be printed out and lamminated

just one thing i am still cofused about is the earth cable off the scootrs ignition which has a bullet connector halfway down and then goes to black (or its vica versa, either way its puzzling, no other ignition i have seen has this)